Basis of Presentation (Details)	Jan. 25, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Stock dividend rate, percent	8.00%

The percentage rate used to calculate stock dividend payments.

No definition available.

Name:	mdc_StockDividendRatePercentage
Namespace Prefix:	mdc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration